The
CCAMP Working Group of IETF would like to inform you of our work on enhancing
GMPLS’s support for Lambda Switching to support the new generation of Lambda
Switch Capable equipment (e.g. ROADMs and PXCs). GMPLS provides a standard
control plane in support of setting up (or restoring) a connection for multiple
technologies (e.g. photonic, TDM (SONET/SDH), Ethernet).
When GMPLS currently sets up an end-to-end wavelength connection (i.e. a
Lambda LSP), the label that identifies the Lambda to use only has local context
(between the neighboring nodes at the ends of the Lambda link). With the recent
progress on optical network technology and the capability to activate/reroute an
optical path over a larger domain comprised of DWDM, ROADMs, and PXCs (e.g.
G.680 Appendix III application), CCAMP participants are interested to
investigate these new applications to ensure the applicability of GMPLS
protocols for connection setup and path computation and whether additional
extensions are needed. The following document “Framework for GMPLS and PCE
Control of Wavelength Switched Optical Networks (WSON)” provides a framework for
our work effort:
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-wavelength-switched-framework-00.txt
Note, CCAMP is concerned with the GMPLS protocol aspects for control of
Lambda Switch Capable equipment. Work on characterization of optical signals,
devices, and fibers is not within our scope.
The
first aspect being considered is a standardized wavelength representation. The
proposal for the wavelength label representation is based on the grids used by
G.694.1 and G.694.2. The following document “Generalized Labels for G.694
Lambda-Switching Capable Label Switching Routers” describes our
proposal:
http://www.ietf.org/internet-drafts/draft-ietf-ccamp-gmpls-g-694-lambda-labels-01.txt